Overview
The ZF 4168.034.154 is a critical OEM genuine component designed specifically for the WG 160 Series transmission. This part functions as a precision-machined guide or actuation element within the hydraulic control assembly, ensuring accurate oil flow modulation during gear shifts. The SKU 4168.034.154 interfaces directly with the main valve body and the TRANSMISSION HOUSING to maintain consistent line pressure. Without this component, the transmission cannot achieve the precise clutch engagement required for smooth power delivery under heavy industrial loads.
Symptoms of Failure
- Erratic shift timing and gear hunting — When the 4168.034.154 wears, hydraulic signals become inconsistent, causing the transmission to hesitate or randomly shift between gears under load.
- Low line pressure at idle — A worn part allows internal leakage, resulting in sluggish engagement and a noticeable delay when moving from neutral to drive.
- Metallic debris in transmission fluid — Surface degradation of this hardened steel component sheds particles that contaminate the oil, often visible during routine fluid changes.
- Intermittent loss of forward or reverse — Severe wear can cause complete pressure loss to specific clutch packs, leading to temporary drive loss during operation.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4168.034.154 |
| Material | Case-hardened alloy steel |
| Weight | 0.85 kg (1.87 lbs) |
| Surface Finish | Ground and polished |
| OEM Reference | ZF WG 160 Series |
| Operating Temperature Range | -20°C to +120°C |
Compatibility
This OEM genuine part is engineered for the ZF WG 160 Series transmission family. It is also compatible with the WG 180 and WG 200 models that share the same hydraulic control architecture. The 4168.034.154 mounts directly to the HOUS.FRONT SECT and works in conjunction with the HOUSING REAR PART to form a sealed hydraulic circuit. For complete assembly, the HOUSING REAR SECTION must also be properly aligned during installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101056 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4656201075 | HOUS.FRONT SECT | Front section housing pump and converter |
| 4656201077 | HOUSING REAR PART | Rear section supporting output shaft |
| 4656298049 | HOUSING REAR SECTION | Intermediate rear housing adapter |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing mating |
| 4656301148 | FIXING PLATE | Retains valve body components |
| 0636100817 | CAP SCREW | M10 fastening bolt for housing |
| 4656301016 | SCREEN SHEET | Fine mesh filter for oil circuit |
| 4656301017 | SCREEN SHEET | Coarse mesh pre-filter |
| 0636100803 | CAP SCREW | M8 fastening bolt for valve body |
Frequently Asked Questions
Q: Can the 4168.034.154 be replaced without removing the transmission?
A: Yes, in most WG 160 applications this part is accessible after draining the fluid and removing the oil pan and valve body. However, the TRANSMISSION HOUSING must remain undisturbed to avoid misalignment.
Q: How does this part differ from a standard valve body spool?
A: The 4168.034.154 is a hardened guide sleeve rather than a moving spool. It provides a wear-resistant bore surface for the shift valve to travel within, reducing friction and extending service life.
Q: What torque specification applies to the retaining bolts?
A: Use 25 Nm for the CAP SCREW (0636100817) and 18 Nm for the CAP SCREW (0636100803) when securing the fixing plate over this component.
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Phone: +86 158 2286 3467 |
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